Russia's President Vladimir Putin said that if U.S. troops appear in Ukraine, Russia will treat them as interventionists on March 13. He also said that North Korea has its own "nuclear umbrella" and Pyongyang has not asked Moscow for any help. Putin also warned that if US troops appear in Ukraine, Russia will treat them as interventionists. He also added Ukraine's recent attacks on Russian regions is to interfere with the upcoming presidential election. He also assured that Russia does not interfere in any elections and it will work with any elected US leader. Watch the video to find out more.